Zinc oxide is an important and widely used physical sunscreen

Zinc oxide is an important and widely used physical sunscreen. The principle of shielding ultraviolet rays is absorption and scattering. Zinc oxide is an N-type semiconductor, and the electrons in the valence band can accept the energy in the ultraviolet light to undergo a transition, which is also the principle of their absorption of ultraviolet light. The function of scattering ultraviolet rays is related to the particle size of the material. When the size is much smaller than the wavelength of ultraviolet rays, the particles can scatter the ultraviolet rays acting on them in all directions, thereby reducing the intensity of ultraviolet rays in the irradiation direction. In addition, if the particle size of this material is too large, unnatural whitening will occur when applied to the skin. Therefore, nano-sized particles have significant advantages compared with the usual size.

Nano-zinc oxide is a stable compound that can provide broad-spectrum ultraviolet protection (UVA and UVB), as well as antibacterial and anti-inflammatory effects. It is almost the safest and most effective ingredient in the evaluation of sunscreens in various countries. However, their extremely small size makes them have higher chemical activity and may be absorbed by the human body, which is potentially harmful to the human body and the environment. Therefore, there is still a lot of controversy regarding the use of nano-scale zinc oxide. For example, the European Union said in 2004 that nano-zinc oxide would be absorbed and may cause DNA damage. Australia stated in a 2006 review that it does not believe that nanoparticles are absorbed in the skin. The United States DNA approved the use of zinc oxide in 1999, but believed that nano-zinc oxide had safety issues and was not allowed to use it. In 2006, it approved nano-zinc oxide as a new effective ingredient.

The most worrying aspect of nanoparticles is that they release free radicals, which increase oxidative stress and damage proteins, esters and DNA in the body. Hydroxyl radicals produced by titanium may cause damage to DNA and cells, and zinc's production of hydroxyl radicals may damage DNA and cell structure in the skin. In addition, when you wear sunscreen to wash your face or swim, or use a lipstick with sun protection factor, there is a high possibility that the nano-level sunscreen contained in it will be directly eaten, so that the human body can directly absorb it. of. Studies have shown that intestines can absorb titanium dioxide particles with a diameter of 150-500nm (slightly higher than the nanometer level, equivalent to micron particles, and particles of this size are also used in sunscreens), and then these particles can also reach the liver and spleen. There is still controversy as to whether nanoparticles can directly enter the blood through the skin. Experiments on animals and human hands show that nano-zinc oxide has an absorption of 0.015-0.023. However, some people think that the skin on human hands is much thicker than lips, eyelids, inner thighs, underarms and other places, and if the absorption of damaged skin is different, they quickly concluded that almost zero absorption of this kind of particles is too much. Sloppy, lack of more experimental evidence.

Overview of zinc oxide ZnO powder

Zinc oxide is an inorganic substance with the chemical formula ZnO, which is an oxide of zinc. Hardly soluble in water, soluble in acid and strong alkali. Zinc oxide is a commonly used chemical additive, which is widely used in the production of plastics, silicate products, synthetic rubber, lubricants, paints, ointments, adhesives, food, batteries, flame retardants and other products. Zinc oxide has a large energy band gap and exciton binding energy, high transparency, and excellent room temperature luminescence performance. It is used in liquid crystal displays, thin film transistors, light-emitting diodes and other products in the semiconductor field. In addition, micro-particle zinc oxide as a nano material has also begun to play a role in related fields.

Application field of zinc oxide ZnO powder

1. Mainly used in rubber or cable industry as a reinforcing agent and activator, also as a colorant and filler for white glue, and used as a vulcanizing agent in neoprene rubber, etc.

2. Used for fine desulfurization of raw gas in the fertilizer industry

3. Mainly used as white pigment, rubber vulcanizing activator, organic synthesis catalyst, desulfurizing agent, used in xerography, pharmacy, etc.

4. Used for the desulfurization of synthetic ammonia, petroleum and natural gas chemical raw materials

5. Used as a matrix for analysis reagents, reference reagents, fluorescent agents and photosensitive materials

6. Used for electrostatic wet copying, dry transfer printing, laser fax communication, electrostatic recording of electronic computers, and electrostatic plate making files

7. Used in the plastic industry, sunscreen cosmetics, special ceramic products, special functional coatings and textile sanitary processing, etc.

8. It is widely used in the deep desulfurization and purification process of industrial raw gas and oil such as synthetic ammonia, methanol and hydrogen production.

9. Used as an astringent, used to make ointments or plasters

10. Used as a white pigment, used in printing and dyeing, papermaking, matches and pharmaceutical industries. In the rubber industry, it is used as a vulcanization activator, reinforcing agent and coloring agent for natural rubber, synthetic rubber and latex. It is also used in the manufacture of pigments such as zinc chrome yellow, zinc acetate, zinc carbonate, and zinc chloride. In addition, it is also used in the manufacture of electronic laser materials, fluorescent powder, feed additives, catalysts, and magnetic materials as zinc supplements in feed processing.

11. Inorganic white pigment. The tinting strength is not as good as titanium dioxide and lithopone powder. It is widely used for the coloring of ABS resin, polystyrene, epoxy resin, phenolic resin, amino resin and polyvinyl chloride, as well as paints and inks. In addition, it can also be used as a vulcanization activator, reinforcing agent and coloring agent for rubber in the rubber industry. It is also used in the production of varnished cloth, cosmetics, enamel, paper, leather, matches, cables, etc. It can also be used in printing and dyeing, glass industry, pharmaceutical industry, etc. It is also used as a desulfurizer for synthetic ammonia. It is also used as electronic laser material, fluorescent powder, feed additive, magnetic material manufacturing, etc.

12. Nutritional supplements (zinc fortifiers).

13. Zinc oxide is a nutrient enhancer for feed.

14. Mainly used as a reinforcing agent for rubber or cables, so that the rubber has good corrosion resistance, tear resistance and elasticity. It is also used as a vulcanization activator for natural rubber, a colorant and filler for white rubber, and a vulcanizing agent for neoprene. Smaller particles (about 0.1μm in diameter) can be used as light stabilizers for plastics such as polyolefin or polyvinyl chloride.

15. Used for desulfurization of synthetic ammonia feed gas.

16. It is used as paint for paint and filler for rubber, and it is used to make ointment, zinc paste, adhesive plaster, etc. in medicine.

17. It is suitable for use as a zinc supplement in feed processing.

18. Mainly used as white pigment, rubber vulcanization activator, reinforcing agent, organic synthesis catalyst, desulfurizing agent.

19. It is used for the desulfurization of synthetic ammonia, petroleum and natural gas chemical raw materials.

20. Used as a matrix for analysis reagents, reference reagents, fluorescent agents and photosensitive materials.

21. It is mainly used as a reinforcing agent and activator in the rubber or cable industry, as a coloring agent and filler for white glue, and as a vulcanizing agent in neoprene.

22. Shimane University in Japan developed luminescent zinc oxide nanoparticles. Zinc oxide is often used in the production of baby powder and other products. It is a non-toxic inorganic substance. The human body will not reject it, so it is highly safe. In addition, zinc oxide nanoparticles are small in size and have the advantage of not hindering cell activity.

The price of zinc oxide ZnO powder

The price of zinc oxide ZnO powder will vary randomly with the production cost, transportation cost, international situation, and market supply and demand of zinc oxide ZnO powder. Tanki New Materials Co.,Ltd aims to help all industries and chemical wholesalers find high-quality, low-cost nanomaterials and chemicals by providing a full set of customized services. If you are looking for zinc oxide ZnO powder, please feel free to send an inquiry to get the latest price of zinc oxide ZnO powder.

Zinc Oxide ZnO powder Supplier

As a global zinc oxide ZnO powder supplier, Tanki New Materials Co. ,Ltd has extensive experience in the performance, application and cost-effective manufacturing of advanced and engineered materials. The company has successfully developed a series of powder materials (cerium oxide, zinc oxide, oxide nickel), high-purity targets, functional ceramics and structural devices, and provide OEM services.